New Horizons may have seen a glow at the solar system’s edge The ultraviolet signal may mark a wall of hydrogen where the sun’s influence wanes BY LISA GROSSMAN 7:00AM, AUGUST 9, 2018

The New Horizons spacecraft has spotted an ultraviolet glow that seems to emanate from near the edge of the solar system. That glow may come from a long-sought wall of hydrogen that represents where the sun’s influence wanes, the New Horizons team reports online August 7 in Geophysical Research Letters.

hydrogen wall illustration

New Horizons may have seen a glow at the solar system’s edge

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